23
1.1.13.
Line Control Board
The following shows a block diagram of the Line Control Board.
The Ring Detector consists of a photocoupler, PC2 (PC1 for LCE), and its peripheral circuits. The ringing
signal is a half-wave rectifier in the Ring Detector, and transferred through the nCTON signal line to the
IC80 on the SC PC Board. The IC80 observes the signal to distinguish from signals caused by chattering.
The Off-Hook Detector (External Telephone) circuit consists of the photocoupler, PC1 (PC2 for LCE), and
its peripheral circuits. When PC1 detects loop current flow, it emits a Low active output signal (nHKOF) to
the IC80 which monitors it for a specified time. If the IC80 detects no change in the Low signal level, it deter-
mines that the External Telephone is Off-Hook.
MODEM
ApI
PC2
PC1
CML
PLS
TCK
Ringing
Detector
Line
Telephone
CML
PC1
nCTON
RMCK
RMCS
RMDT
CLK
P/S
Q8
PC2
JP18~23
Country
Code
Jumper
IC2
CML
PLS
TCK
+24V
+24V
+24V
Q1
Q3
Q4
Off-Hook
Detector
HYBSR
<MDM>
< LCE >
L : Ring In
H : FAX Side
H : Make
CN8
CN25
11
11
10
10
7
7
8
8
9
9
5
5
6
6
CMLD
PLSD
14
14
Ringer
Off-Hook
Dial Pulse
Loop Relay
TCKD
[DZYNA1436*]
MODEM
PC2
CML
PLS
Ring
Detector
Line
Telephone
CML
C5
Q2
Off-Hook
Detector
HYBSR
< MDM >
< LCU >
PC1
GND
T2
Q1
PC1
nCTON
PLS
CML
+24V
CMLD 5
PLSD 6
PC2
nHKOFF 9
+5V
+5V
L : Off-Hook
H : On-Hook
L : Ring In 10
H : FAX Side
CN7
H : Make
for Auto Receive
API
[DZYNA1435*]
MODEM
PC1
PC2
CML
PLS
Ring
Detector
Line
Telephone
CML
C5
Q2
HYBSR
< MDM >
< LCE >
GND
T2
Q1
PC2
nCTON
PLS
CML
+24V
CMLD 5
PLSD 6
PC1
nHKOFF 9
+5V
+5V
L : Off-Hook
L : Ring In 10
H : FAX Side
CN7
L : Break
API
[DZEP000441]
L : Telephone
L : Break
L : Telephone
L : Break
H : On-Hook
L : Telephone
H : Make
Summary of Contents for DP-3000
Page 2: ...The contents of this Technical Guide are subject to change without notice Published in Japan...
Page 148: ...148 2 27 EP PC Board Drawing Name EP PC Board 1 8 Model DP 2000 2500 3000...
Page 149: ...149 Drawing Name EP PC Board 2 8 Model DP 2000 2500 3000...
Page 150: ...150 Drawing Name EP PC Board 3 8 Model DP 2000 2500 3000...
Page 151: ...151 Drawing Name EP PC Board 4 8 Model DP 2000 2500 3000...
Page 152: ...152 Drawing Name EP PC Board 5 8 Model DP 2000 2500 3000...
Page 153: ...153 Drawing Name EP PC Board 6 8 Model DP 2000 2500 3000...
Page 154: ...154 Drawing Name EP PC Board 7 8 Model DP 2000 2500 3000...
Page 155: ...155 Drawing Name EP PC Board 8 8 Model DP 2000 2500 3000...
Page 156: ...156 2 28 G3B PC Board Drawing Name G3B PC Board 1 10 Model DP 2000 2500 3000...
Page 157: ...157 Drawing Name G3B PC Board 2 10 Model DP 2000 2500 3000...
Page 158: ...158 Drawing Name G3B PC Board 3 10 Model DP 2000 2500 3000...
Page 159: ...159 Drawing Name G3B PC Board 4 10 Model DP 2000 2500 3000...
Page 160: ...160 Drawing Name G3B PC Board 5 10 Model DP 2000 2500 3000...
Page 161: ...161 Drawing Name G3B PC Board 6 10 Model DP 2000 2500 3000...
Page 163: ...163 Drawing Name G3B PC Board 8 10 Model DP 2000 2500 3000...
Page 164: ...164 Drawing Name G3B PC Board 9 10 Model DP 2000 2500 3000 LCU LCE PCB LCU LCE PCB...
Page 165: ...165 Drawing Name G3B PC Board 10 10 Model DP 2000 2500 3000 To SC PCB...
Page 166: ...166 2 29 FRM PC Board Drawing Name FRM PC Board 1 1 Model DP 2000 2500 3000...
Page 177: ...177 2 31 LANC PC Board Drawing Name LANC PC Board 1 1 Model DP 2000 2500 3000...
Page 185: ...185 2 38 MAIN LVPS PC Board 100V MAIN LVPS PC Board 100V Drawing Name Model DP 2000 2500 3000...
Page 186: ...186 2 39 MAIN LVPS PC Board 200V MAIN LVPS PC Board 200V Drawing Name Model DP 2000 2500 3000...
Page 191: ...191 Drawing Name Finisher Controller PC Board 2 11 Model DP 2000 2500 3000...
Page 192: ...192 Drawing Name Finisher Controller PC Board 3 11 Model DP 2000 2500 3000...
Page 193: ...193 Drawing Name Finisher Controller PC Board 4 11 Model DP 2000 2500 3000...
Page 194: ...194 Drawing Name Finisher Controller PC Board 5 11 Model DP 2000 2500 3000...
Page 195: ...195 Drawing Name Finisher Controller PC Board 6 11 Model DP 2000 2500 3000...
Page 196: ...196 Drawing Name Finisher Controller PC Board 7 11 Model DP 2000 2500 3000...
Page 197: ...197 Drawing Name Finisher Controller PC Board 8 11 Model DP 2000 2500 3000...
Page 198: ...198 Drawing Name Finisher Controller PC Board 9 11 Model DP 2000 2500 3000...
Page 199: ...199 Drawing Name Finisher Controller PC Board 10 11 Model DP 2000 2500 3000...
Page 200: ...200 Drawing Name Finisher Controller PC Board 11 11 Model DP 2000 2500 3000...
Page 342: ...DZZSM00171 0...